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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Features shared by parsing and pre-parsing scanners. | 5 // Features shared by parsing and pre-parsing scanners. |
6 | 6 |
7 #ifndef V8_SCANNER_H_ | 7 #ifndef V8_SCANNER_H_ |
8 #define V8_SCANNER_H_ | 8 #define V8_SCANNER_H_ |
9 | 9 |
10 #include "src/allocation.h" | 10 #include "src/allocation.h" |
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477 } | 477 } |
478 | 478 |
479 // Scans the input as a regular expression pattern, previous | 479 // Scans the input as a regular expression pattern, previous |
480 // character(s) must be /(=). Returns true if a pattern is scanned. | 480 // character(s) must be /(=). Returns true if a pattern is scanned. |
481 bool ScanRegExpPattern(bool seen_equal); | 481 bool ScanRegExpPattern(bool seen_equal); |
482 // Returns true if regexp flags are scanned (always since flags can | 482 // Returns true if regexp flags are scanned (always since flags can |
483 // be empty). | 483 // be empty). |
484 bool ScanRegExpFlags(); | 484 bool ScanRegExpFlags(); |
485 | 485 |
486 // Scans the input as a template literal | 486 // Scans the input as a template literal |
487 Token::Value ScanTemplateSpan(); | 487 Token::Value ScanTemplateStart(); |
| 488 Token::Value ScanTemplateContinuation(); |
488 | 489 |
489 const LiteralBuffer* source_url() const { return &source_url_; } | 490 const LiteralBuffer* source_url() const { return &source_url_; } |
490 const LiteralBuffer* source_mapping_url() const { | 491 const LiteralBuffer* source_mapping_url() const { |
491 return &source_mapping_url_; | 492 return &source_mapping_url_; |
492 } | 493 } |
493 | 494 |
494 bool IdentifierIsFutureStrictReserved(const AstRawString* string) const; | 495 bool IdentifierIsFutureStrictReserved(const AstRawString* string) const; |
495 | 496 |
496 private: | 497 private: |
497 // The current and look-ahead token. | 498 // The current and look-ahead token. |
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685 // Scans an escape-sequence which is part of a string and adds the | 686 // Scans an escape-sequence which is part of a string and adds the |
686 // decoded character to the current literal. Returns true if a pattern | 687 // decoded character to the current literal. Returns true if a pattern |
687 // is scanned. | 688 // is scanned. |
688 bool ScanEscape(); | 689 bool ScanEscape(); |
689 // Decodes a Unicode escape-sequence which is part of an identifier. | 690 // Decodes a Unicode escape-sequence which is part of an identifier. |
690 // If the escape sequence cannot be decoded the result is kBadChar. | 691 // If the escape sequence cannot be decoded the result is kBadChar. |
691 uc32 ScanIdentifierUnicodeEscape(); | 692 uc32 ScanIdentifierUnicodeEscape(); |
692 // Helper for the above functions. | 693 // Helper for the above functions. |
693 uc32 ScanUnicodeEscape(); | 694 uc32 ScanUnicodeEscape(); |
694 | 695 |
| 696 Token::Value ScanTemplateSpan(); |
| 697 |
695 // Return the current source position. | 698 // Return the current source position. |
696 int source_pos() { | 699 int source_pos() { |
697 return source_->pos() - kCharacterLookaheadBufferSize; | 700 return source_->pos() - kCharacterLookaheadBufferSize; |
698 } | 701 } |
699 | 702 |
700 UnicodeCache* unicode_cache_; | 703 UnicodeCache* unicode_cache_; |
701 | 704 |
702 // Buffers collecting literal strings, numbers, etc. | 705 // Buffers collecting literal strings, numbers, etc. |
703 LiteralBuffer literal_buffer1_; | 706 LiteralBuffer literal_buffer1_; |
704 LiteralBuffer literal_buffer2_; | 707 LiteralBuffer literal_buffer2_; |
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744 bool harmony_classes_; | 747 bool harmony_classes_; |
745 // Whether we scan TEMPLATE_SPAN and TEMPLATE_TAIL | 748 // Whether we scan TEMPLATE_SPAN and TEMPLATE_TAIL |
746 bool harmony_templates_; | 749 bool harmony_templates_; |
747 // Whether we allow \u{xxxxx}. | 750 // Whether we allow \u{xxxxx}. |
748 bool harmony_unicode_; | 751 bool harmony_unicode_; |
749 }; | 752 }; |
750 | 753 |
751 } } // namespace v8::internal | 754 } } // namespace v8::internal |
752 | 755 |
753 #endif // V8_SCANNER_H_ | 756 #endif // V8_SCANNER_H_ |
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